لا هوائي
Aerobic and anaerobic bacteria can be identified by growing them in liquid culture:
1: Obligate aerobic (oxygen-needing) bacteria gather at the top of the test tube in order to absorb maximal amount of oxygen.
2: Obligate anaerobic bacteria gather at the bottom to avoid oxygen.
3: Facultative bacteria gather mostly at the top, since aerobic respiration is the most beneficial one; but, as lack of oxygen does not hurt them, they can be found all along the test tube.
4: Microaerophiles gather at the upper part of the test tube but not at the top. They require oxygen but at a low concentration.
5: Aerotolerant bacteria are not affected at all by oxygen, and they are evenly spread along the test tube.
1: Obligate aerobic (oxygen-needing) bacteria gather at the top of the test tube in order to absorb maximal amount of oxygen.
2: Obligate anaerobic bacteria gather at the bottom to avoid oxygen.
3: Facultative bacteria gather mostly at the top, since aerobic respiration is the most beneficial one; but, as lack of oxygen does not hurt them, they can be found all along the test tube.
4: Microaerophiles gather at the upper part of the test tube but not at the top. They require oxygen but at a low concentration.
5: Aerotolerant bacteria are not affected at all by oxygen, and they are evenly spread along the test tube.
كائن لا هوائي Anaerobic ، هوقدرة الكائنات الحية على المعيشة في البيئات ، التي ينعدم فيها الأكسجين الحر ، أي غير المتحد مع عناصر أخرى .
التمثيل الغذائي
التخمر
Culturing anaerobes
المصادر
- ^ عبد الجليل هويدي، محمد أحمد هيكل (2004). أساسيات الجيولوجيا التاريخية. مخطة الدار العربية للخط.
انظر أيضا
- كائن هوائي
- Anaerobic infection
- Anaerobic digestion
- Biogas
- Digester
- Facultative anaerobic organism
- Hypoxia (environmental)
- Fermentation (biochemistry)
- Waste management
- Oxygen catastrophe
- Spinoloricus Cinzia
